| Application | Description |
|---|---|
| apache | Apache is the world's most used web server software. |
| apparmor | AppArmor is a Linux kernel security module that allows the system administrator to restrict program's capabilities with per-program profiles. |
| arpwatch | ARPWatch is a computer software tool for monitoring Address Resolution Protocol traffic on a computer network. |
| Auditd | The Linux Audit system provides a way to track security-relevant information on your system. Based on pre-configured rules, Audit generates log entries to record as much information about the events that are happening on your system as possible. |
| clamav | Clam Antivirus (ClamAV) is a free and open-source, cross-platform antivirus software tool-kit able to detect many types of malicious software. |
| courier | IMAP/POP3 server. |
| dovecot | Dovecot is an open-source IMAP and POP3 server for Linux/UNIX-like systems, written primarily with security in mind. |
| dropbear | Dropbear is a software package that provides a Secure Shell-compatible server and client. It is designed as a replacement for standard OpenSSH for environments with low memory and processor resources, such as embedded systems. |
| firewalld | FirewallD provides a dynamically managed firewall with support for network/firewall zones to define the trust level of network connections or interfaces. Default firewall management tool RHEL and Fedora. |
| ftpd | Simple FTP server. |
| imapd | imapd is the Courier IMAP server that provides IMAP access to Maildir mailboxes. |
| mailscanner | MailScanner is a highly respected open source email security system design for Linux-based email gateways. |
| mysql | MySQL is an open-source relational database management system (RDBMS). |
| nginx | Nginx is a web server with a strong focus on high concurrency, performance and low memory usage. |
| pam | A pluggable authentication module (PAM) is a mechanism to integrate multiple low-level authentication schemes into a high-level application programming interface (API). |
| php | PHP is a server-side scripting language designed for web development but also used as a general-purpose programming language. |
| postfix | Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail. |
| postgresql | PostgreSQL is an object-relational database management system (ORDBMS) with an emphasis on extensibility and on standards-compliance. |
| proftpd | ProFTPD is an FTP server. |
| Puppet | Puppet is an open-source configuration management utility. |
| pure-ftpd | Pure-FTPd is a free (BSD license) FTP Server. |
| racoon | Racoon is a key management daemon used for VPN connections. |
| roundcube | Roundcube is a web-based IMAP email client. |
| sendmail | Sendmail is a general purpose internet email routing facility that supports many kinds of mail-transfer and delivery methods, including SMTP used for email transport over the internet. |
| smbd | SMBD is a server that can provide most SMB services. The server provides filespace and printer services to clients using the SMB protocol. |
| spamd | spamd is a ISC-licensed lightweight spam-deferral daemon written under the umbrella of the OpenBSD project. spamd works directly with smtp connections, and supports features such as greylisting, minimizing false positives compared to a system that does full-body analysis. |
| squid | Squid is a caching and forwarding web proxy. |
| sshd | sshd (SSH Daemon) is the daemon program for ssh. |
| systemd | Systemd is a software suite for central management and configuration of the GNU/Linux operating system. |
| telnetd | Telnet protocol daemon. |
| vsftpd | vsftpd is an FTP server for Unix-like systems, including Linux. |
| wordpress | WordPress is a free and open-source content management system (CMS) based on PHP and MySQL. |